<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Pdf
 * @subpackage Actions
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id$
 */


/**
 * PDF target (action or destination)
 *
 * @package    Zend_Pdf
 * @subpackage Actions
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
abstract class Zend_Pdf_Target
{
	/**
	 * Parse resource and return it as an Action or Explicit Destination
	 *
	 * $param Zend_Pdf_Element $resource
	 * @return Zend_Pdf_Destination|
	 * @throws Zend_Pdf_Exception
	 */
	public static function load(Zend_Pdf_Element $resource) {
		require_once 'Zend/Pdf/Element.php';
		if ($resource->getType() == Zend_Pdf_Element::TYPE_DICTIONARY) {
			if (($resource->Type === null  ||  $resource->Type->value =='Action')  &&  $resource->S !== null) {
				// It's a well-formed action, load it
				require_once 'Zend/Pdf/Action.php';
				return Zend_Pdf_Action::load($resource);
			} else if ($resource->D !== null) {
				// It's a destination
				$resource = $resource->D;
			} else {
				require_once 'Zend/Pdf/Exception.php';
				throw new Zend_Pdf_Exception('Wrong resource type.');
			}
		}

		if ($resource->getType() == Zend_Pdf_Element::TYPE_ARRAY  ||
		$resource->getType() == Zend_Pdf_Element::TYPE_NAME   ||
		$resource->getType() == Zend_Pdf_Element::TYPE_STRING) {
			// Resource is an array, just treat it as an explicit destination array
			require_once 'Zend/Pdf/Destination.php';
			return Zend_Pdf_Destination::load($resource);
		} else {
			require_once 'Zend/Pdf/Exception.php';
			throw new Zend_Pdf_Exception( 'Wrong resource type.' );
		}
	}

	/**
	 * Get resource
	 *
	 * @internal
	 * @return Zend_Pdf_Element
	 */
	abstract public function getResource();
}
